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WorksheetsG7 science - Elec and magnetism Test
Total questions: 29
Worksheet time: 10mins
What is the energy change for a burning candle?
chemical energy → light energy
chemical energy → heat energy + kinetic energy
light energy → heat energy + chemical energy
chemical energy → light energy + heat energy
What is the name of positive charge?
electron
neutron
proton
nucleus
What is the name of negative charge?
neutron
electron
proton
nucleus
Like charges _________ each other.
attract
repel
touch
Unlike charges ________ each other.
repel
attract
touch
What is the name of this tool?
insulator
dosimeter
electroscope
microscope
What is the unit for voltage?
ampere
current
volt
resistance
What is the unit for current?
volt
voltage
ohm
ampere
____________is the quantity of electricity that is measured by the ammeter.
Voltage
Current
Resistance
Magnetic field
Name of the electric component
Bulb
Rheostat
voltmeter
Dry cell
Which one is the circuit diagram of this picture?
As the voltage increases ↑, what happens to the current?
Current stays the same
Current increases ↑
Current decreases ↓
Each time a lightbulb is added to a series circuit, the other bulbs in the circuit __________.
get brighter
get dimmer
stay the same brightness
will explode
In parallel circuit, there are _________ pathways for charge to flow.
One
Two or more
None
Zero
If we add more light bulbs into a parallel circuit, how will the brightness of the bulbs change?
It will get dimmer
It will get brighter
The brightness will stay the same
None of the light bulb will be on
What is the advantage of having a safety switch or fuse in the electric circuits of your house?
Safety switches break the circuit when there is no fault
Safety switches switch the electrical current
It prevents the circuit from overheating and starting the fire
Fuses are fused together with electrical wires
Name the electric component below:
Namakan komponen elektrik berikut:
Dry cell
Sel kering
Bulb
Mentol
Switch
Suis
Wire
Wayar
What type of magnet is this?
a bar magnet
a "U" magnet
a horseshoe magnet
a stick magnet
The image above shows how iron filings respond to magnetic fields generated by two magnets with ____________ poles facing each other.
opposite
like
positive
negative
What causes static electricity?
only an object losing electrons
only an object gaining electrons
when positive and negative charges no longer balance
A ___________ charged object __________ a positively charged object.
neutrally / repels
positively / repels
negatively / repels
Which of the following would be a good conductor for a closed circuit?
wood
copper
rubber
Where is a magnetic field the strongest?
at both poles
in the middle
at the south-seeking pole
A material that conducts electric current poorly is called __________.
a circuit
a charge
an insulator
What would happen to the other bulbs in the circuit if one light bulb burns out?
the other light bulbs will remain on
the other light bulbs will go out
the other light bulbs will be dimmer
Why does a compass needle point in a north-south direction?
The needle reacts to Earth's magnetic poles.
The needle forms an electromagnet with Earth's poles.
The needle is lightweight, so it always spins to the south.
What is produced when a coiled wire is spun around a magnet?
electrical energy
magnetic energy
mechanical energy
